Breakpoint junctions in different exon 8 deletions of MSH2. Panel (a) two deletions of Sardinian origin S.1, c.1277−1180_1386+2226del3516insCATTCTCTTTGAAAA; S.2, c.1276+198_1386+3761del19280. Panel (b) three deletions found in three families of non-Sardinian origin. Family N, c.1277−6284_1386+4776del11170; family P, c.1277–6224_1386+4836del11170; family Q, c.1277–4076_1386+1819del6005.